Pamphlet-stapling machine



(No Model.) 4 ShetS- -Sheet 1. D. A. PLAVELL. PAMPHLET STAPLING MAUHINB.

No; 516,156. Patented Mar. 6,1894.

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. D. A. FLAVELL.

PAMPHLET STAPLING MACHINE.

No. 516,156. Patented Mar. 6, 1894.

Inv entor,

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WABHINGTON, It a (No Model.) 4 Sheets -Sheet 3. D. A. PLAVELL. PAMPHLETSTA-FLYING MACHINE.

'Pat'en-ted Mar. 6, 1894.

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Nrrn STATES DENIS A. FLAVELL, OF NEW YORK, N. Y., ASSIGNOR TO MAURICE A.METOALF, OF BOSTON, MASSACHUSETTS.

PAMPHLET-STAPLING MACHINE.

SPECIFICATION forming part of Letters Patent No. 516,156, dated March 6,1894.

Application filed February 10, 1893. Serial No. 461,747. (No model.)

To all whom it may concern.-

Be it known that I, DENIS A. FLAVELL, a citizen of the United States ofAmerica, residing in the city, county, and State of New York,

have invented certain new and useful Improvements in Pamphlet-staplingMachines, of which the following is a specification.

This machineforms and inserts wire stitches or staples through theleaves of pamphlets or books for the purpose of securing them together.

It consists of mechanism actuated by power applied to a pulley, by whichwire, preferably flattened into aband, is fed into the machine, formedinto a U shaped staple, inserted through the sheets to be fastenedtogether and clinched.

My invention consists in various improvements in this class ofmechanism, which contribute to the simplicity of construction, fa cilityof operation ,ease of adjustment to varying conditions, and to thequality of the work, as will be hereinafter specifically pointed out andclaimed.

In the accompanying drawings, Figure 1 shows a front elevation of themachine, in which the cap is removed from the head so as to show thestaple forming mechanism. Fig. 2 is a side elevation with certain partsin section along the line 010 Figs. 3 and 4 show the clutch mechanism;the former being a horizontal section through the pulley along the lineand the latter a vertical section along the line 00 taken through thehub on the sprocket wheel. Fig. 5 shows a side and edge view of the capremoved from the head in Fig. 1. Fig. 6 shows a side and edge view ofthe forked die and its actuating cam by which the wire is cut off andthe ends are bent down. Fig. 7 shows similar views of the staple isdriven through the leaves which are to be connected. Fig. 8 shows a sideview of the wire-feed mechanism. Fig. 9 is a front view of the head inwhich the staple forming and driving mechanism is supported and guided.Fig. 10 shows top, front and edge views of the horn-cap. This isattached to the horn of the machine and guides the clinching punch. Fig;11 shows front and side views of the end of the horn. Fig. 12 showsfront and side views of the clinching punch. Fig. 13 is a front View ofthe frame on top of the column of the machine. Fig. 14. is atop view ofthe arm carrying the head.- Figs. 15 to 18, which are drawn to doublethe scale of the preceding figures, show the successive positions takenby the parts which form,drive, and clinch the staple. Fig. 19 is anenlarged side view of the wire-feed mechanism. Fig. 20 is a front viewof the same.

The driving mec7ram'sm.-The main frame or stationary part of my machineconsists of a column 1, to which are attached a frame 2 and a horn 3.The driving "pulley 4. runs loose on the shaft 5 which is journaled inthe frame. A sprocket wheel 6 is made fast to this shaft. This wheel hasa hub 7 which is notched as shown in Fig. 4. Apawl 8 is pivoted to thehub of the pulley, and engages with the notch in the hub of the sprocketwheel. This pawl is so balanced that it will be thrown into engagementwith the hub of the sprocket wheel by centrifugal force when the wheelis revolving at its full speed. The pawl is restrained from engagingwith the notch in the sprocket wheel hub, except when the machine is tobe operated, by a clutch arm 9. This is connected by a rod 10 with atreadle 11. These areheld up by a spring 12. When the treadle isdepressed, it pulls downthe clutch arm and leaves the heavy end of thepawl free to be thrown out by centrifugal force when the notch isreached and effect the engagement of the clutch. If the power is notunder full headway the centrifugal force will not be sufficient to throwthe clutch, and the imperfect action of the staple forming and ejectingmechanism is thereby guarded against. To the frame 2, are hinged an arm13, lever 14, and chain tightener 15. The sprocket wheel 6 drives, bymeans of a chain 16, a second sprocket wheel 17 which is mounted on theshaft 18 journaled in the head. These sprocket wheels have the samenumber of teeth in each, so that the shafts on which they are fastenedand the cams thereon will revolve synchronously. Five independentmovements are derived from the cams on these two shafts. I will describethem in the order in which they take place in the revolution of theshafts from the initial positions in which they are shown in Figs. 1, 2,4, 6 and 7.

First, there is a pair of cams 19 19 which abut against rolls 2O 20 onthe lever 14. These serve to force down the head 21 with all itscontained mechanism and to grip the work which is placed between it andthe horn 3. The head it will be noticed is on the end of the arm 13,which is normally held up by the spring 22.

Second, a cam 23 imparts a vertical movement to the forked die. This dieconsists of ablock 24 hearing a cam roll at its upperend and twohardened steel blades 26 26 which project downward from it. The head isrecessed as a guide to this die. The lower end of this recess is of adepth equal to the width of the wire-that is,about one thirty-second ofan 1 inch, and the blades are thinned at their lowerendssoastolieflushinthissection. Thewireis led horizontally into thisportion of the recess through a groove 27. Above the wire, the recess inthe head is made deeper and wider to admit the block. The grooves in theblock for the blades are made deeper than the recess in which the stapleis formed so that the partsof the blades which lie in these can bethicker and stronger. A shaping block 28 projects through an opening inthe head below the wire into the recess, and is pressed by a spring 29against the cap 30 which is screwed to the head and incloses the mech-ianism. This shaping block is rectangular in form.

then both blades contact with the ends of the wire and bend them overthe shaping block as shown in Fig. 16. die reaches the bottom of itsstroke, a rod 31, attached to a projection on the back of this die, andbeveled at its lower end, engages the edge of an opening in the shapingblock and retracts it from the recess where it serves as a former aboutwhich the wire is shaped.

Third, a cam 32 imparts a vertical movement to the punch 33. This punchlies between the blades of the forked die and carries a cam roll 34 atits upper end. I make the punch of one piece of metal. It is thinned atits lower end where it enters the narrow recess in which the staple isformed, but where it lies in the block 24 it is thicker and stronger,and is further strengthened by a rib on its front side. The cap 30 isnotched as shown in order to clear this rib. The punch in descendingejects the staple from the head and forces its ends through the leavesof the pamphlet placed under it to be stitched. By organizing the headas above described, the power which forces it down is applied directlyabove it and not through the agency of a lever, and all the movementsincluding its motion as a whole as well as the independent movements ofits parts are derived from cams on a single shaft. On passing throughthe work, the ends of the staple enter two conical holes in the top ofthe horn- As the forked die. descends, the blade at the left firstshears off the wire and Just before the forked cap 35. The centers ofthese holes are nearer together than the ends of the staple, but theyflare sufficiently to engage the ends. The holes are connected by a slotwhich is continned as a groove to the lower edge of the horn-plate. Whenthe staple is driven down by the punch, its ends are deflected towardeach other by the sides of the conical holes sufficiently to projectthem into this groove as shown in Fig. 17. The sides of these conicalholes deflect the ends much better than simple inclined edges to theslot, for the flare in all directions enables the ends of the staple toenter with more certainty, and they are returned into the plane of thestapleif they become shifted sidewise in passing through the work.

Fourth, a cam 36 on the shaft 5 acting through the rod 37, lever 38 androd 39, lifts the clinching punch 40, and sets up the ends of the stapleas shown in Fig. 18. The upper portion of the groove in which this isguided lies in the horn-cap, and the lower portion lies in the horn. Thegroove in the horn is deeper so that the lower end of the clinchingpunch, which is withdrawn from the groove and adjoining which thedrivingrod39ishinged,may be of sufficient strength. \Vhen the clinchingpunch is driven up, its blow is transmitted through the staple to thedriving punch. It is of course possible to trace the stress of this blowthrough a chain of elements back to the clinching punch. As shown in mymachine the driving punch reacts through its cam roll 34., against thecam 32, and from this the stress is transmitted to the cams 19 .19, tothe lever 14, to the framework, and from the framework back to theclinching punch through its actuating mechanism. In this chain ofelements I have introduced aspring 41. It is in a measure immaterialwhich of these elements itlies between. I have shown it between thelever 14 and the frame 2. Normally it presses the end of the leverfirmly against the nut 42 on the screw 13 secured to the frame, but whenthe staple and the work are compressed between the two punches it yieldsso that either thick or thin work may be operated upon without in anyway changing the adjustment of the machine. A further advantage followsfrom the use of this spring in the more perfect clinchingof the staple.Its sudden compression as the clinching punch drives up the ends of thestaple causes one or more rebounds, the effect of which, I find, is tosetthem up much more closely than it is possible to do by simplepressure or by a single blow in a rigid machine. By placing parts ofsome weight, as for example the head of the machine, between the stapleand the spring, a strong blow is struck by the parts on the rebound.

Fifth. After the foregoing movements have taken place and the forked dieand'thedriving punch, at least, have returned, the feeding in of thewire takes place. On the side of the sprocket wheel 17 is a cam 44.Thiseam IIO contacts with the cam roll on the lever 45, and through thepawl 46 and ratchet wheel 47 turns the feed-rolls48 and 4:9 and feedsthe wire. Gears 55 and 56 are fastened 011 the shafts bearing the feedrolls, and transmit motion from the upper to the lower shaft so that thelower feed roll as well as the upper is positively driven. The shaft ofthe lower feed-roll 49 is journaled in a block 50 which is supported onpivots screwed in the head. A spring 51 lies between the rear ends ofthe shafts to which the feed-rolls are attached, and, by pressing themapart, forces the rolls together. The feeding in of the wire and thereturn of all the parts conclude the cycle of the movements.

The work ta-ble.The table 52 on which the work is supported is hinged onpins 53 53. It can be fastened either in a horizontal position or at anangle of forty-five degrees by removable pins passing through the lugson its under side at 54. When tipped at the angle its rear edge alignsas near as may be with the top of the horn-cap where the staple isclinched, and when brought to ahorizontal position it must come to theheight that the corner occupied when in the angular position. Theseconditions are attained by 10- cating the holes for the hinge pins inthe horn on a line y drawn through the point where the staple is formedand at one-fourth of a right angle from the line in which the staple isdriven. On the table, the hinge pins are similarly located on a line .2drawn through the edge of the table and at the same angle with one ofits sides. By suitably shaping the parts, I am enabled to provide a rearas well as a front face to the table without its interfering with thehorn when tilted to the inclined position.

Without limiting myself to the precise details of the constructionshown, what I claim, and desire to secure by Letters Patent, is-

1. In apamphlet stapling machine, the combination with a suitablesupporting framework, of a reciprocating head containing mechanism forforming and inserting staples, a cam shaft journaled on said head, camson said shaft for actuating said mechanism, mechanism for clinching thestaples, a second cam shaft from which said clinching mechanism isactuated and means for synchronously actuating both shafts,substantially as described.

2. In a pamphlet stapling machine, the combination with a suitablesupporting framework, of areciprocating head, mechanism containedtherein for forming and inserting staples, a cam shaft journaled on saidhead, cams on said shaft for actuating said mechanism, mechanism forclinching the staples, a second cam shaft from which said clinchingmechanism is actuated, and positive flexible c0nnections between theshafts, substantially as described.

3. In a pamphlet stapling machine, the combination of a reciprocatinghead, a cam situated directly over said head for effecting itsreciprocation, mechanism in said head for forming and inserting staples,and a support for the work against which it is gripped by the head,substantially as described.

4. In a pamphlet stapling machine, the combination of a reciprocatinghead, mechanism in said head for forming and inserting staples, a camshaft journaled in said head, cams on said shaft for effecting saidreciprocation and actuating said mechanism, and a support for the workagainst which it is gripped by the head substantially as described.

5. In a pamphlet stapling machine, the combination with a punch forinserting staples, of a support for work containing two conical holesconnected by a slot, a clinching punch guided in said slot, andactuating mechanism for said punches, substantially as described.

6. In a pamphlet stapling machine, the combination with a punch forinserting staples, of a clinching punch, actuating mechanism for bothpunches, and a spring independent of said actuating mechanism and in theline of stress disposed so as to yield under the thrust of the twopunches against each other, substantially as' described.

7. In a pamphlet stapling machine the combination with a supportingframework of a reciprocating head containing staple forming mechanism, apunch for inserting staples guided therefrom, a spring independent ofsaid actuating mechanism and in the line of stress between said'head andframework, a clinching punch, and mechanism for reciprocating said headand actuating said punches, substantially as described.

8. In a wire feed mechanism, a pair of feed roll shafts in combinationwith feed rolls thereon, a transversely pivoted journal block for one ofthe shafts and a spring between the ends of said shafts on the oppositeside of the journal block from the feed rolls, substantially asdescribed.

Signed by me, in New York city, this 4th day of February, 1893.

DENIS A. ELAVELL.

Witnesses:

SAMUEL W. BALOH, BEN L. FAIROHILD.

